Cerebral Hemispheres

Question 1

How to fibres emerge from and converge on the cerebral cortex?

Answer 1

Corona radiata

Question 2

What midline cleft separates the two hemispheres?

Answer 2

The median longitudinal fissure

Question 3

What is the corpus callosum?

Answer 3

Sheet if white matter connecting the hemispheres

Question 4

What extends into the median longitudinal fissure?

Answer 4

The falx cerebri

Question 5

What separates the frontal and parietal lobe above from the temporal lobe below?

Answer 5

The lateral sulcus

Question 6

What separates the parietal and frontal lobes?

Answer 6

The central sulcus

Question 7

What lies immediately in front of the central sulcus?

Answer 7

The precentral gyrus

Question 8

What is the function of the precentral gyrus?

Answer 8

It is the primary motor cortex

Question 9

What lies in front of the precentral gyrus?

Answer 9

The premotor cortex- includes superior, middle and inferior frontal gyri

Question 10

What lies immediately behind the central sulcus?

Answer 10

The postcentral gyrus

Question 11

What is located in the postcentral gyrus?

Answer 11

The somatosensory cortex

Question 12

What is posterior to the post central gyrus?

Answer 12

The intraparietal sulcus

Question 13

What divides the superior and inferior parietal lobules?

Answer 13

The intraparietal sulcus

Question 14

What lies deep in the lateral fissure?

Answer 14

The insula- covered by operculae

Question 15

How many gyri is the temporal lobe divided into?

Answer 15

3- superior, inferior and middle temporal gyri

Question 16

Where is the primary auditory cortex located?

Answer 16

Superior temporal gyrus, specifically transverse temporal gyrus

Question 17

What marks the location of the primary visual cortex?

Answer 17

The calcarine sulcus, medial surface of the occipital lobe

Question 18

How many laminae are located over the old part of the brain

Answer 18

3

Question 19

How many lamina are located over the newer part of the brain?

Answer 19

6

Question 20

What sort of information does the posterior cerebrum receive?

Answer 20

Information from outside world via somatosensory, primary visual and primary auditory cortices

Question 21

What is the function of the limbic areas on the medial surface of the hemispheres?

Answer 21

Storage and retrieval of information

Question 22

Where is Broca’s area located?

Answer 22

The inferior frontal gyrus

Question 23

What is the function of Broca’s area?

Answer 23

To assemble spoken language

Question 24

What is the supplementary motor cortex?

Answer 24

The area corresponding to premotor cortex on the medial surface of the hemispheres

Question 25

What is the most anterior part of the parietal lobe?

Answer 25

The postcentral gyrus

Question 26

How does primary visual cortex receive input from the retina?

Answer 26

Via the lateral geniculate nuclei of the thalamus

Question 27

What types of fibres make up white matter?

Answer 27

3- association, commisural and projection

Question 28

What is the function of association fibres?

Answer 28

Connect cortical areas lying within one cerebral hemisphere

Question 29

What is the function of commisure fibres?

Answer 29

Run from one cerebral hemisphere to the same area in the other- connects functionally equivalent areas

Question 30

What is the function of Projection Fibres?

Answer 30

Pass between cerebral cortex and subcortical areas

Question 31

When is the premotor cortex active?

Answer 31

When learned motor routines are completed in response to external cues

Question 32

What does the supplementary cortex respond to?

Answer 32

Internal cues, in particular motor planning

Question 33

Give example of association fibres.

Answer 33

Arcuate Fasiculus

Question 34

Give example of commissural fibres.

Answer 34

Corpus Callosum

Question 35

Give example of projection fibres.

Answer 35

Corticospinal pathway